JPH1117817A - Private branch exchange transfer method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a selection of a transfer party and to attain improvement of convenience of its use by an operation of a caller at the time of blocking a busy tone, no response and absent transfer in a private branch exchange. SOLUTION: A main switch 41 in a private branch exchange 40 switches between an internal line and an external line and forms a speech path. When audio response equipment 43 registers a transferred party, speech synthesis data for performing an audio guidance is transmitted to internal terminals 51 to 55 on the side of an originator through the main switch 41. Furthermore, a terminal information recording device 44 stores each information of the transferred party. Then, when an incoming call becomes non-originating call processing by a busy tone, no response and absent transfer, a central processing unit 42 selects a transferred party among plural transferred parties on the basis of an input operation signal from the internal terminals 51 to 55 or controls a transfer to an non-registered transferred party instructed by the input operation signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private branch exchange transfer system for handling a busy, non-answering, and call forwarding in a private branch exchange.
Alternatively, the present invention relates to a private branch exchange transfer system for transferring data to a manually input transfer destination.

[0002]

2. Description of the Related Art Conventionally, this type of private branch exchange has been busy,
When setting the non-response and the call forwarding, for example,
As in the conventional example disclosed in Japanese Patent Laid-Open No. 05213, all calls are not indiscriminately transferred.

FIG. 10 is a block diagram showing a configuration of a conventional private branch exchange. The private branch exchange 20 shown in FIG. 10 is a telephone or a facsimile machine that performs telephone calls or facsimile transmission / reception by calling or receiving an extension / external line.
2, 13, 14; an analog extension I / F unit 21 connected to the extension telephones 11 to 14 for performing extension interface (I / F) processing; And an analog line I / F unit 22 for performing I / F processing.

Further, the private branch exchange 20 includes a switch unit 23 for switching between an analog extension I / F unit 21 and an analog office line I / F unit 22 to switch between the transmission and reception of an extension and an outside line, and extension terminals 11 to 11. 14 has a register circuit 24 for storing a dialed number when a call is originated, and a control unit 25 for controlling when the switch unit 23 switches the transmission or reception of an extension and an outside line, and the extension terminals 11 to 14
A storage unit 26 for storing data such as extension numbers and transmission restrictions, for example, restrictions on outside line transmission at night;
A public telephone line network 30 to which the / F unit 22 is connected, and external terminals 31, 32, 33, 34 such as telephones or facsimile machines that perform outgoing / incoming calls and facsimile transmission / reception through the public telephone line network 30. doing.

FIG. 11 is a block diagram showing the functional configuration of the control unit 25 and the storage unit 26. The control unit 25 includes a call recognition unit 25a for executing the call processing program, a transfer destination and the extension terminals 11 to 14 or the external terminal 31 of the call for the transfer.
And a numerical analysis connection unit 25b for analyzing the telephone numbers of .about.34.

The storage unit 26 stores the extension terminals 11 to 14
A terminal information area 26a for storing the extension number of the destination terminal, the extension number of the transfer destination terminal and the extension number of the transferable terminal, a monitoring area 26b for storing the terminal status signal, and a work area 26c for temporarily storing the processing data. have.

Next, the operation of this conventional example will be described. First, the extension terminal 11 to the private branch exchange 20 transmits to the extension terminal 12 to 14 or the external terminal 3 as a transfer destination (call destination).
A call forwarding service specifying 1 to 34 is registered. Here, the registered service special number “# 11” is input. When the transfer destination is the extension terminal 12 and the call for the transfer is the extension terminal 13, each extension telephone number is input. Further, the digit analysis connection unit 25b in the control unit 25 stores the data of these extension telephone numbers in the storage unit 26.
In the terminal information area 26a.

Thereafter, a call recognition unit 25a in the control unit 25
Stores the extension telephone number of the extension terminal 11 in the work area 26c when the extension terminal 13 calls the extension terminal 11.
Next, the number analysis connection unit 25b sets the extension terminal 11
It is determined whether or not the setting of the call forwarding service is performed. By this identification, the extension telephone numbers stored in the work area 26c and the terminal information area 26a are compared, and it is determined that the extension terminal 11 is the transfer destination, and the switch unit 23 is controlled to control the extension terminal 13 and the extension terminal 12 Connect.

[0009]

However, in the above conventional example, when the private branch exchange is busy, non-answering or non-calling processing due to call forwarding (hereinafter referred to as block time), the telephone terminal makes a call. Calls are automatically forwarded to the registered phone number. In other words, there is a disadvantage that the caller cannot select a desired transfer destination, which is inconvenient to use.

The present invention solves such problems in the prior art.
It is an object of the present invention to provide a private branch exchange transfer system in which a caller can select a desired transfer destination when a non-response and call forwarding are blocked, thereby improving the convenience of use.

[0011]

In order to achieve the above object, an invention according to claim 1 is directed to a private branch exchange transfer system for processing busy, non-response, and call forwarding. When a non-call originating process is performed due to a busy, non-answer, or absence transfer, a pre-registered transfer destination is selected and transferred by an input operation signal from the calling telephone terminal, or
It is configured to include an exchange transfer processing unit that transfers an incoming call originating from a telephone terminal to a non-registered transfer destination specified by an input operation signal.

According to a second aspect of the present invention, there is provided a private branch exchange transfer system, wherein the exchange transfer processing means includes a registration means for registering a plurality of transfer destinations, and a non-call originating process when an incoming call from a telephone terminal is busy, unanswered, or absent. Is selected based on an input operation signal from the calling telephone terminal, or specified by an input operation signal from the telephone terminal. It is configured to include a selection fetching unit that fetches the registered unregistered transfer destination, and a control unit that performs control of transferring an incoming call from the telephone terminal to the transfer destination from the selection fetching unit.

According to a third aspect of the present invention, there is provided a private branch exchange transfer system, wherein the exchange transfer processing means connects an outgoing call or an incoming call of an extension and an outside line, registers a plurality of transfer destinations, and receives an incoming call from the telephone terminal. Selecting a transfer destination from a plurality of transfer destinations registered in the registration means based on an input operation signal from a calling telephone terminal when a non-calling process is performed due to a non-response or a call forwarding failure; A private branch exchange that controls the transfer of an incoming call from a telephone terminal to a non-registered transfer destination instructed by an input operation signal from the telephone terminal, and performs a call by calling or receiving an extension and an external line through the private branch exchange. When the outgoing call is busy, the call is not answered, or the call is not forwarded, the caller is instructed to select a transfer destination from among the registered transfer destinations, or input a non-registered transfer destination. Extension end There configured to include and.

According to a fourth aspect of the present invention, there is provided a private branch exchange transfer system, wherein the private branch exchange device switches between an extension and an outside line to form a communication path, and a voice for performing voice guidance when a transfer destination is registered. A voice response device that sends the synthesized data to the calling extension terminal through the main switch, a terminal information recording device that stores the transfer destination information of each of the plurality of extension terminals, and an incoming call that is busy, unanswered, or absent When non-calling processing is performed, a transfer destination is selected from a plurality of registered transfer destinations based on an input operation signal from the telephone terminal, or a transfer destination specified by the input operation signal from the telephone terminal. And a central processing unit that performs control to transfer a call from the telephone terminal to the central processing unit.

According to a fifth aspect of the present invention, in the private branch exchange transfer system, the terminal information recording device includes a service information recording unit that records service information of each of a plurality of extension terminals, and transfer destination data of each of the plurality of extension terminals. And a transfer destination information recording unit for recording.

In a private branch exchange transfer system according to a sixth aspect, the transfer destination is an extension telephone or an external telephone.

According to a seventh aspect of the present invention, in the private branch exchange transfer system, when the call destination is busy, the transfer destination is notified to the calling side when the call destination is busy, and the automatic calling is performed again. It is a camp-on processing unit that makes calls.

In the private branch exchange transfer system according to the present invention, the transfer destination is a voice mail device.

According to a ninth aspect of the present invention, in the private branch exchange transfer system, the service information recording unit includes, for each extension terminal, a service name including a busy transfer, an unanswered transfer, and an unattended transfer;
The configuration uses a service information table that stores a setting flag indicating whether the setting corresponding to the service name is on or off.

The private branch exchange transfer method according to claim 10 is as follows.
As the transfer destination information recording unit, for each extension terminal, a transfer destination information table for storing the absence transfer destination, the busy transfer destination, and the unanswered transfer destination storing the transfer destination name and the transfer destination number is used. .

The private branch exchange transfer method according to the present invention having the above-mentioned structure is adapted to be operated by an input operation signal from the telephone terminal on the calling side when a call from the telephone terminal is blocked due to busy, no answer, or call forwarding. The incoming call is transferred to a pre-registered transfer destination or a designated non-registered transfer destination.

That is, at the time of blocking of busy, non-response and call forwarding in the private branch exchange, the transfer destination can be selected by the operation of the caller. Accordingly, unlike the conventional example, the incoming call is not automatically transferred to the extension number stored in advance, and the convenience of use in busy, non-answering, and call forwarding at the time of incoming call is improved.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the private branch exchange transfer system of the present invention will be described in detail with reference to the drawings. FIG.
FIG. 1 is a block diagram showing a configuration of a private branch exchange transfer system according to an embodiment of the present invention. The example of FIG. 1 shows a private branch exchange 40 that processes outgoing and incoming calls of an extension and an external line, a telephone that performs a call or facsimile transmission / reception of an outgoing or incoming call of the internal and external lines through the private branch exchange 40, and an extension terminal 51 as a facsimile machine. 52, 53, and 55. Furthermore, a voice mail device 54 for performing voice mail communication, a public telephone line network 60 to which the private branch exchange 40 is connected, a telephone for performing outgoing or incoming calls and facsimile transmission / reception via the public telephone line network 60, and a facsimile machine As an external terminal 71.

The private branch exchange 40 switches between an analog extension I / F section and an analog office line I / F section (not shown) to control a main switch 41 for forming a communication path and each section of the private branch exchange 40. It has a central processing unit 42, and has a voice response device 43 for transmitting voice synthesis data for voice guidance, and a terminal information recording device 44 for storing information on extension terminals 51 to 55. .

FIG. 2 is a block diagram showing a detailed configuration of the terminal information recording device 44. This terminal information recording device 44
Has a service information recording unit 44a that records service information for each of the extension terminals 51 to 55, and a destination information recording unit 44b that records the destination data of the extension terminals 51 to 55.

FIG. 3 is a diagram showing a service information format in the service information recording section 44a. The service information format includes a service name "... camp-on ... busy transfer," as a service information table of the extension terminal 51.
Non-response transfer, absence transfer ... ", setting flag" ... OFF ... O
N, ON, ON ... "and data 1 and 2" ... NULL (empty) ... NULL, NULL, NULL ... ".

FIG. 4 is a diagram showing a transfer destination information format in the transfer destination information recording section 44b. This transfer destination information format has columns for absent transfer destination, busy transfer destination, and unanswered transfer destination as a transfer destination information table of the extension terminal 51. The absent transfer destination includes a transfer destination number “38000, 36530,” for each of the transfer destination names “voice mail, transfer destination 1, transfer destination 2,.
23677, NULL (empty), NULL ”.

The busy transfer destination includes a transfer destination number "38000, 36530, NULL" for each of the transfer destination names "voice mail, transfer destination 1, transfer destination 2,... Transfer destination 5."
(Empty), NULL, NULL ”. Further, the non-response forwarding destinations include forwarding destination numbers “38000, 36530, NULL, NULL, N” for the forwarding destination names “voice mail, forwarding destination 1, forwarding destination 2,.
"ULL" is stored.

Next, the operation of this embodiment will be described. First, the operation of each unit will be described with reference to FIG. The main switch 41 in the private branch exchange 40 controls the connection between the extension terminals 51 to 55 and the voice mail device 54 under the control of the central processing unit 42 and the external terminals via the extension terminals 51 to 55 and the public telephone network 60. A connection between the extension terminal and the voice response device 43 and a connection between the voice response device 43 and the external terminal 71 via the public telephone network 60 are made.

The central processing unit 42 controls the main switch 41 as described above, and controls the voice response unit 43 so as to notify the corresponding guidance when the data of the busy, unanswered, or missed transfer destination is registered. And extension terminals 51 to 55
The terminal information recording device 44 identifies the PB tone signal from
To register data. The central processing unit 42
Refers to information recorded in the terminal information recording device 44 when a call is transmitted from the extension terminal 55 to the extension terminal 51.

When the data of the busy, non-response, and absence transfer destinations are set and the setting state of the extension terminal 51 is busy, non-response, or absence transfer, respectively, the main switch 41 is controlled to control the extension. The terminal 55 and the voice response device 43 are connected to each other, and the voice response device 43 is controlled to give a guidance notification, and a transfer destination is selected by identifying a PB tone signal from the calling side. The voice response device 43 is a central processing unit 42
The voice guidance is created by the control of
Extension terminals 51-55, external terminal 7
The voice guidance for any one of the items 1 is reproduced and output to the main switch 41.

The service information recording unit 44a in the terminal information recording device 44 includes extension terminals 51 to 5 accommodated in the private branch exchange 40, as shown in the service information format of FIG.
5 for each service information. When the setting flag item corresponding to each service name in the service information recording unit 44a is ON (ON), the service is set, and when the setting flag item is OFF (OFF), the service is not set. Indicates that it is not set. The service setting and cancellation of the unanswered call or call forwarding are shown in FIG.
This is set according to the processing procedure shown in FIG. When the call destination is busy, the caller is notified at the end of the call, and the camp-on (callback) setting for automatically making a call again is set by the processing procedure described with reference to FIG. Is done.

As shown in FIG. 4, the transfer destination information recording section 44b includes extension terminals 51 to 55 accommodated in the private branch exchange 40.
, And manages the transfer destination information when the non-response or call forwarding service is set, and is registered through the processing procedure shown in FIG.

Next, the processing procedure for registering busy, non-response, and absence transfer destination information will be described in detail. FIG. 5 is a flowchart showing a processing procedure of transfer destination information registration.
First, the extension terminal 51 accommodated in the private branch exchange 40 dials the special number "# 20" of the transfer destination information registration service. The central processing unit 42 controls the main switch 41 to connect the extension terminal 51 to the voice response device 43 (step S
30).

The voice response unit 43 is controlled by the central processing unit 42, and sends a guidance guidance notification to the extension terminal 51 when selecting a transfer destination to be set (step S31). The extension terminal 51 operates the push button to select a type for registering a transfer destination from among busy, unanswered, and unattended transfer (step S32). The central processing unit 42 identifies the dial from the extension terminal 51, and
4b, it is determined whether or not the corresponding transfer destination information is registered (step S33).

If the transfer destination information is registered, the voice response device 43 is controlled to send the transfer destination data change guidance and the current transfer destination data content guidance (steps S34 and S35). If the transfer destination information is not registered, a notification of the transfer destination data new creation guidance is transmitted (step S37). Thereafter, the central processing unit 42 identifies the PB tone signal from the extension terminal 51, controls the voice response device 43 and the terminal information recording device 44, and performs the transfer destination data change processing and the transfer destination data registration processing ( Steps S36 and S38). When this process ends, the connection between the extension terminal 51 and the voice response device 43 is disconnected.

Here, a service special number is set for the private branch exchange 40 to perform various services. FIG. 6 is a diagram showing an example of a service special number. In the example of FIG. 6, the service names “busy transfer setting, non-answer transfer setting, call forwarding setting, transfer destination information setting, busy transfer release, non-answer transfer release,
In response to "Call Forwarding Release", the service special number "# 1
0, # 11, # 12, # 20, # 30, # 31, # 3
2 "is set.

Next, a description will be given of the setting of the busy, non-response, call forwarding, and cancellation. FIG. 7 is a flowchart showing a processing procedure for setting busy, non-response and call forwarding. During this talk,
In the process of setting the non-response and the absence transfer, the extension terminal 51 accommodated in the private branch exchange 40 dials the special number "# 10" of the transfer service setting shown in FIG. Central processing unit 42
Controls the main switch 41 to connect the extension terminal 51 to the voice response device 43 (step S40).

The central processing unit 42 includes a destination information recording unit 4
4b, it is checked whether the transfer destination information corresponding to the service special number is registered (step S41). If the transfer destination information is registered, the service information recording unit 44
The corresponding setting flag in a is turned on (ON) (step S42), a guidance notification of the completion of the setting is transmitted to the extension terminal 51, and the process ends (step S43). If the transfer destination information is not registered, the extension terminal 5
Then, a guidance notification indicating that there is no transfer destination data is sent to No. 1 and the process ends (step S44).

FIG. 8 is a flow chart showing the processing procedure for canceling busy, non-response and call forwarding. In the process of canceling the unanswered call and the call-forwarding, the extension terminal 51 accommodated in the private branch exchange 40 dials the service special number "# 30" for canceling the transfer setting service shown in FIG. The central processing unit 42 which has taken in the service special number “# 30” controls the main switch 41 so that the extension terminal 51 and the voice response unit 43
Are connected (step S50).

The central processing unit 42 has a destination information recording unit 44
b, the service setting flag corresponding to the service special number for canceling the transfer setting service is turned off (OFF) (step S51), and the central processing unit 42 controls the voice response device 43, from which the transfer service is transmitted to the extension terminal 51. A guidance notification of completion of release is transmitted, and the process ends (step S52).

Next, a description will be given of a calling operation to the extension terminals 51 to 55 in which the busy, unanswered, and call forwarding services are registered. FIG. 9 is a flowchart showing a processing procedure of a calling operation to the extension terminals 51 to 55 in which the busy, no answer, and call forwarding services are registered. Here, the extension terminal 55 sends a call to the extension terminal 51, and the extension terminal 51 is used as a transfer destination for the extension terminals 52 and 53 and the voice mail device 54.
Is set.

The extension terminal 55 makes a call to the extension terminal 51 (step S61). The central processing unit 42 refers to the service information recording unit 44a, and the extension terminal 51 checks whether or not the call forwarding is set (step S62). If the call forwarding is set here, the main switch 41 is controlled to connect the extension terminal 55 to the voice response device 43, and a guidance notification of a caller absence guidance is transmitted to the extension terminal 55 (step S63). ). If no call forwarding is set, normal processing is performed.

Next, after notifying the busy, non-response, and absence guidance guidance in step S63, the central processing unit 42 refers to the transfer destination information recording unit 44b, controls the voice response device 43, and sets as the transfer destination. Voice mail device 54, transfer destination 1
Is notified to the extension terminal 55 that the telephone number of the transfer destination 2 is set. As the next operation, select the desired destination from the registered destinations,
When the call destination is busy, notify the caller of the end of the call, set up camp-on (callback) to perform automatic call again, or select a transfer destination that is not registered Is output from the voice response device 43 (step S64).

After the notification of the next operation selection guidance, a desired transfer destination is selected from the registered transfer destinations. That is, the camp-on setting is selected, the setting process is performed, and the process ends (steps S65 and S66). Further, a transfer process to the extension terminal 52 is selected, and the transfer process is performed.
The process ends (steps S67 and S68). Furthermore,
The transfer process to the extension terminals 53 and 54 is selected, the transfer process is performed, and the process ends (steps S69, S70, S7).
1, S72). Further, a transfer process to a telephone number other than registration is selected, a transfer destination telephone number is accepted, the transfer process is performed, and the process is completed (steps S73 and S7).
4, S75).

In the processing in this case, the user operates the bush button of the extension terminal 55 to send out the dial number,
Select the desired operation. If camp-on is selected here, the central processing unit 42 turns on (ON) the camp-on setting flag of the service information recording unit 44a, and the data 1
Then, the extension number of the extension terminal 55 is registered, the connection between the voice response device 43 and the extension terminal 55 is disconnected, and the process ends.

When the transfer destinations 1 and 2 or the voice mail device 54 are selected, the central processing unit 42 sends a hold tone to the extension terminal 55, and the transfer processing to the transfer destinations 1 and 2 or the voice mail device 54, respectively. I do. When a transfer destination not registered in the transfer destination information recording unit 44b is specified,
The central processing unit 42 identifies the PB tone signal dialed by the extension terminal 55 and controls the main switch 41 to perform a transfer process.

Next, when the absence transfer is not set in step S62, the central processing unit 42 confirms whether or not the non-response transfer is set in the service information recording unit 44a (step S76). Here, when the setting of the non-response transfer is performed, the number of ringings set in the private branch exchange 40 is monitored, and when this ringing exceeds a predetermined number, the main switch 41 is controlled to control the extension terminal. 55 and the voice response device 43, and sends a guidance notification of the destination non-response guidance to the extension terminal 55 (step S77,
S78).

When the extension terminal 51 is busy and the busy transfer is set (steps S76 and S77), the main switch 41 is controlled to allow the extension terminal 55 and the voice response device 43 to operate.
Is transmitted to the extension terminal 55 (step S78). If the extension terminal 51 is not busy and the busy transfer is not set (steps S76 and S77), the connection with the extension terminal 51 is made and the process is terminated (step S79).

In this embodiment, the same operation is performed even if the private branch exchange 40 having no camp-on service function is used.

[0051]

As is apparent from the above description, according to the private branch exchange transfer system of the present invention, when a call from a telephone terminal is blocked due to busy, non-answering, or call forwarding, the caller's telephone is called. In accordance with an input operation signal from the terminal, a transfer destination registered in advance or a non-registered transfer destination is selected to transfer a call.

As a result, the transfer destination can be selected by the input operation on the telephone terminal by the caller at the time of blocking the busy, non-answering, or call forwarding in the private branch exchange. For example, the incoming call is automatically set to the extension number stored in advance. The call is not transferred, and the convenience of use during busy, non-answer, or call forwarding at the time of the incoming call is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a private branch exchange transfer system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a detailed configuration of a terminal information recording device in FIG.

FIG. 3 is a diagram showing a service information format in a service information recording unit in FIG. 1;

FIG. 4 is a diagram illustrating a transfer destination information format in a transfer destination information recording unit in FIG. 1;

FIG. 5 is a flowchart showing a processing procedure of transfer destination information registration in the embodiment.

FIG. 6 is a diagram illustrating an example of a service special number in the embodiment.

FIG. 7 is a flowchart illustrating a processing procedure of busy, non-response, and absence transfer setting in the embodiment.

FIG. 8 is a flowchart illustrating a processing procedure for canceling a busy, non-response, or absence transfer in the embodiment.

FIG. 9 is a flowchart illustrating a processing procedure of a calling operation of the extension terminal in the embodiment.

FIG. 10 is a block diagram showing a configuration of a conventional private branch exchange transfer system.

11 is a block diagram illustrating a functional configuration of a control unit and a storage unit in FIG.

[Explanation of symbols]

 Reference Signs List 40 private branch exchange 41 main switch 42 central processing unit 43 voice response device 44 terminal information recording device 44a service information recording unit 44b transfer destination information recording unit 51-55 extension terminal 54 voice mail device 60 public telephone network 71 external terminal

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04Q 3/58 106 H04Q 3/58 106

Claims (10)

[Claims] 1. A private branch exchange transfer system for processing busy, non-answer, and call forwarding, wherein a call originating from a telephone terminal when a call from a telephone terminal becomes non-call processing due to a busy, non-answer, or call forwarding. An exchange for selecting and transferring a transfer destination registered in advance according to an input operation signal from the telephone terminal of the present invention, or transferring an incoming call originating from the telephone terminal to a non-registered transfer destination specified by the input operation signal A private branch exchange transfer system comprising transfer processing means. 2. An exchange transfer processing means, comprising: a registration means for registering a plurality of transfer destinations; and a registration means for receiving a call from a telephone terminal when the incoming call is busy, unanswered, or absent. A transfer destination selected from among a plurality of transfer destinations registered in the telephone terminal based on an input operation signal from the calling telephone terminal, or an unregistered transfer destination specified by the input operation signal from the telephone terminal 2. A private branch exchange transfer according to claim 1, further comprising: a selection fetching means for fetching a call; and a control means for controlling transfer of an incoming call from the telephone terminal to a transfer destination from the selection fetching means. method. 3. An exchange / transfer processing means for connecting outgoing / incoming calls of internal and external lines, registering a plurality of forwarding destinations, and receiving incoming calls from telephone terminals not busy due to busy, unanswered calls and call forwarding. When the process is selected from the plurality of transfer destinations registered in the registration means based on the input operation signal from the calling telephone terminal, or,
A private branch exchange that controls the transfer of an incoming call from the telephone terminal to a non-registered transfer destination instructed by an input operation signal from the telephone terminal; and When the outgoing call is busy, the call is not answered, or the call is not forwarded, the caller is instructed to select a transfer destination from among the registered transfer destinations, or input a non-registered transfer destination. 2. The private branch exchange transfer system according to claim 1, further comprising: an extension terminal for giving an instruction. 4. A private switch as the private branch exchange, which switches between an internal line and an external line to form a communication path, and sends voice synthesis data for performing voice guidance at the time of registration of a transfer destination through the main switch. A voice response device for sending to the extension terminal on the side, a terminal information recording device for storing the transfer destination information of each of the plurality of extension terminals, and a non-originating process when an incoming call is busy, unanswered, or absent. Selecting a transfer destination from a plurality of registered transfer destinations based on an input operation signal from the telephone terminal, or transmitting a call from the telephone terminal to a transfer destination specified by the input operation signal from the telephone terminal. 4. The private branch exchange transfer system according to claim 3, further comprising: a central processing unit that controls transfer. 5. A service information recording unit for recording service information of each of a plurality of extension terminals, a destination information recording unit for recording destination data of each of a plurality of extension terminals, The private branch exchange transfer system according to claim 4, comprising: 6. The private branch exchange transfer system according to claim 1, wherein the transfer destination is an extension telephone or an external telephone. 7. The transfer destination is a camp-on processing unit that, when the call destination is busy, notifies the calling side of the end of the busy state and performs automatic call again. 2. The private branch exchange transfer system according to claim 1, wherein: 8. The private branch exchange transfer system according to claim 1, wherein the transfer destination is a voice mail device. 9. The service information recording unit includes, for each extension terminal, a service name including a busy transfer, an unanswered transfer, and an unattended transfer, and a setting corresponding to the service name, which is set to ON or OFF. 6. The private branch exchange transfer system according to claim 5, wherein a service information table storing a flag is used. 10. A transfer destination information table for storing, for each extension terminal, a missed transfer destination storing a transfer destination name and a transfer destination number, a busy transfer destination and an unanswered transfer destination for each extension terminal. 6. The private branch exchange transfer system according to claim 5, wherein